Convertible spade and hoe.



No. 819,181. PATENTED MAY l, 1906' J. P. STENSTROM.

CONVERTIBLE SPADE AND HOE.

APPLICATION TILED SEPT. 7, 1905.

UNITED STATES PATENT OFFICE.

JOHN P. CTENSTROM, OF MORA, MINNESOTA, ASSIUNOR OF ONE-THIRD TO ANTONPETERSON AND ONE-THIRD TO ANDREW M. ANDERSON,

OF MORA, MINNESOTA.

CONVERTIBLE SPADE AND HOE.

Specification of Letters Patent.

Lcatented May 1, 1906.

To all whom, it may concern.-

Be it known that I, J OHN P. STENSTROM, a citizen of the United States,residing at Mora, in the county of Kanabec and State of Minnesota, haveinvented certain new and useful Improvements in Convertible Spades andlloes: and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

\[y invention has for its object to provide a combination spade and hoe;and to this end it consists of the novel devices and combinations ofdevices hereinafter described and defined in the claim.

The invention is illustrated in the accompanying drawings, wherein likecharacters indicate like parts throughout the several views.

Figure 1 is a plan view showing the device with its blade adjusted foruse as a spade. Fig. 2 is a view, partly in side elevation and partly insection, on the line of Fig. 1, some parts being broken away. Fig. 3 isa side elevation of the device with its blade shown by full linesadjusted for use as a spade and shown by dotted lines as adjusted foruse as a hoe, some parts being broken away. Fig. 4 is a side elevationof the parts shown in Fig. 3, but showing the said parts separated. Fig.5 is a view corresponding to Fig. 2, but with the device adjusted foruse as a hoe; and Fig. 6 is an enlarged view, partly in plan and partlyin horizontal section, showing the construction of the connectionbetween the blade and the handle.

The numeral 1 indicates the blade, and the numeral 2 the handle, of thedevice, the said two parts being pivotally connected and being combinedwith means for locking the blade in either of its two positions.

Referring in detail to the connection between the said parts, thenumeral 3 indicates a flanged socket which is riveted or other wiserigidly secured to the blade and is pro-- vided with threelaterally-spaced lugs 4, 4, and 5, the latter of which is centrallylocated and is much longer than the other two.

The handle 2 has secured to its lower end a metallic socket 6, that isformed with the bifurcated trunnion or stub 7, the prongs of whichembrace the central lug 5 of the member 3 and are attached to the threelugs thereof by a pin or bolt 8.

Rotatively mounted on the trunnion 7 is a lock-ring 9, that is formed inone side with an open notch 10 and is beveled at one end to form a camsurface 11. Below the three lugs 4, 1, and 5 the socket member 3 isformed with a bearing-shoulder 12. The front edge of lug 5 is shown tohave depressed bearingsurfaces 13 near its ends equidistant from thepivot-hole.

The relation of the parts described is such that when the blade 1 isturned into the position shown in Figs. 1 and 2 and by full lines inFig. 3 and the lock-ring 9 is turned so that its notch 10 is out of linewith the front edge of the central lug 5 it will lock the said lug 5,and hence the blade 1, against the pivotal movements with respect to thehandle 2. Also the construction is such that when the lock-ring 9 isturned aproximately as shown by full lines in Fig. 3 its cam-surface 11will press against the shoulder 12 of the socket member 3, therebytightly wedging said ring between said shoulder 12 and the shoulder atthe junction of the trunnion 7 with the socket member 6, and therebylock the said ring against accidental movements and also take up allplay between the parts.

hen it is desired to turn the blade into the position shown by dottedlines in Fig. 3, the lock-ring 9 is turned so that its notch 10 willregister with the back edge of the lug 5, thereby permitting said lockto pass through said notch and permit the blade to be turned into itssaid dotted-line position, Fig. 3, and full-line position, Fig. 5. Tolook the said blade in this position, the lock-ring is then again turnedwith its notch 10 out of line with the long lug 5, thereby causing itscam-surface 11 to engage the two bearing-surfaces 13 of said lug, andthereby locking the blade in said position and securing said lock-ringfrictionally against accidental movements.

The utility of a convertible spade and hoe of the character abovedescribed is too obvious to require much comment. There are of coursemany classes of work which may be more conveniently accomplished withthe blade turned into an angular position or approximately at a rightangle to the handle. The device when thus adjusted is the one designatedas a hoe and may be used after vertical embankments and like work.

It will of course be within the scope of my invention to 'apply a forkto a handle by the means above described or by the use of similardevices.

What I claim, and desire to secure by Letters Patent of the UnitedStates, is as follows:

The combination with a handle 2 having a bifurcated trunnion 7, of ablade 1 having a socket member formed with the outside hinged lugs 4 andthe centrally-located relatively long lug 5 pivotally connected to saidbifurcated trunnion 7, the said lug 5 working between the prongsthereof, and the lockring 9 having a notch 10 and cam-surface 11, whichring is mounted on said trunnion 7 and operates on said lug 5 to locksaid blade in either of its two positions, and which camsurface 11cooperates with bearing-surfaces carried by said blade to frictionallyhold said ring in its locked position, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN P. STENSTROM. WVitnesses:

WV. S. SoU'rHwIoK, CLARA M. KoLsRUD.

